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High-speed photonically assisted analog-to-digital conversion using a continuous wave multiwavelength source and

Bartosz J Bortnik1, Harold R Fetterman

  • 1Department of Electrical Engineering, University of California Los Angeles (UCLA), Los Angeles, CA 90034, USA. bartb@ucla.edu

Optics Letters
|October 3, 2008
PubMed
Summary
This summary is machine-generated.

A novel photonic analog-to-digital conversion system uses a continuous-wave multiwavelength source for simpler, high-speed data conversion. This approach avoids mode-locked lasers, enabling potential monolithic integration for advanced signal processing.

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Area of Science:

  • Photonics
  • Optical Engineering
  • Signal Processing

Background:

  • Traditional analog-to-digital converters (ADCs) face limitations in speed and resolution.
  • Photonic-assisted ADCs offer potential for higher bandwidths.
  • Mode-locked lasers, often used in photonic ADCs, are complex and costly.

Purpose of the Study:

  • To present a simplified photonic analog-to-digital conversion (PADC) system.
  • To demonstrate a PADC system utilizing a continuous-wave (CW) multiwavelength source.
  • To explore integration potential on a monolithic chip.

Main Methods:

  • Utilized a CW multiwavelength source and phase modulation.
  • Employed a dispersive device (single-mode fiber) to create a pulse train.
  • Experimentally demonstrated time-stretched and interleaved PADC systems at 38 GHz.

Main Results:

  • Successfully generated a pulse train from the CW multiwavelength source via dispersion.
  • Demonstrated PADC operation at 38 GHz using both time-stretched and interleaved methods.
  • Validated the feasibility of a simpler photonic ADC architecture.

Conclusions:

  • The proposed system offers a simpler and potentially more cost-effective alternative to existing photonic ADCs.
  • The demonstrated 38 GHz operation highlights the system's high-speed capability.
  • The potential for monolithic integration suggests future advancements in compact, high-performance ADCs.